Researching solar and thought this might help others who plan to do Solar
Differences between batteries wired in series and batteries wired in parallel. How to wire in both series AND parallel at the same time. Why you would use each type of system in your off-grid solar panel system.
My truck (non Ambulance) is wired Series/Parallel yet is also 12v and 24v pulled from that bank. Done this way by the manufacturer. Not sure whether cart came first or the horse as to why they did that.
aka- was the mix of commercially available parts they decided would be best for the truck's purpose ended up with some 24v and others 12v? Like the starter is 24v and so is the transmission yet driving lights and dash is 12v. orrr did manufacture feel having 24v and12v pulled from the bank was wisest for both charging off one 24v alternator and for equalizing discharging thru out all batteries....... thus they chose to use a mix match of voltage components?
Another way to think about it when it comes to the Series/Parallel arrangement using 4 batteries
Think of it like-
. Connect two batteries wired in series. These two just got ADDED together. So you're ending up with all their volts added together (6+6 or 12+12 etc.).
. Now just pretend that this new set of two added together is actually just one larger battery.
. Do the same with the other two.
. Call one set of the two; Big ass Battery (A).. and the other Big ass Battery (B)...
. So now... you just have A and B. Cool nothing hard about that.
. Now connect "Big ass A" and "Big ass B" in Parallel just like you would if you had only started with two batteries you wanted to put in parallel
.... tada. you're done.
. Take what you just made and see it as 1 BIG BERTHA BATTERY. don't think of it as 4 confusingly wired together batteries..... just think of it as poor old Big Bertha.
. If you took 4 more and set them up the same way you then have two Big Bertha's. If you want you can hook those in parallel and have "one" BEHEMOTH battery.
and so on and so on. If you just see each series Bank of batter(ies) as if they were just one big battery it stays easy to grasp.
(been there done that. once had 16... twelve-volt batteries making up one GIGANTIC 24v battery that I attempted to use on an off grid home I once had. used above method to keep it all straight while setting them up all together.
Question on how this relates to Isolators though, If you take existing single battery banks, and turn them into "Big ass A" and "Big ass B" by combining batteries in parallel, Does this really matter to your isolator at all? You've greatly increased your available amperage, and possibly flow from the alternator to the batteries, so does the Isolator need to be upgraded? Do they (Isolators) have specific amperage ratings, or is that more dependent on what the alternator creates and connected accessories can draw than what the Batteries can deliver?